/Engine/Source/Runtime/ApplicationCore/Public/GenericPlatform/GenericPlatformApplicationMisc.h
Asyncronously display the platform-specific input device selection UI, if supported.
false if the platform does not support an input device selection API, or it is not currently available (the callback will not be called)
static bool ShowInputDeviceSelector ( [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) InitiatingUserId, FShowInputDeviceSelectorComplete OnShowInputDeviceSelectorComplete )